Snap Groups
Snap groups are now composed of 4 integers, a primary & 3 extras (all bitmasks).
The primary snap group is SnapPointMatchGroup & the secondary group is the X value of ExtraSnapPointMatchGroup (the Y & Z values are not used).
Floors & Ceilings
(top down view)
Primary Snap Groups
Secondary Snap Groups
Walls & Slopes
(side view)
Primary Snap Groups
Secondary Snap Groups
Additional Primary Groups
Sloped Side of Corners
Pillars